"Decide and Conquer," which provides a guide for new CEOs, based on his experiences leading Meetup through a series of challenges, including its acquisition by WeWork and the subsequent COVID-19 pandemic. The text features anecdotes and insights from Siegel's career, along with advice on decision-making, building company culture, managing crises, and navigating leadership transitions. It also includes reflections on the importance of building relationships, being honest with employees, and prioritizing long-term goals.